Unknown Service & Engine Test Codes

nedsim · ‎03-07-2022

I posted previously about persistent jams at the registration assembly in a 9050dn. I'm about as certain as I can be that it's not a mechanical issue in the registration assembly. I've cleaned the clutches and tested them in and out of the reg assembly with a DC power supply. They work when the printer is starting up and when clearing the paper path after a jam, but do not engage when running a print job.

Running a service test displays: "1429,0000,0000,0000" There's no 1429 code listed in my service manual, can't find anything online.

The Event Log page (in addition to the jam codes) reads: "88 0E29 FailCode from Engine Self-Test Execution" I can't find anything on that either.

Does anyone have any idea what these codes are?

Or have any idea what may be preventing the activation of the clutches?

Thanks.

Repairatrooper · ‎03-17-2022

If the clutches are working during startup, I would recommend that you perform a cold reset on the printer. I have found cases where the brains just get scrambled and need to basically start over.

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nedsim · ‎03-18-2022

Thanks for the reply.

After my previous post I tried a cold reset, with no change to the problem. I just tried again, and also reinitialized the NVRAM. Again, no change.

I found DC controller boards for sale (only $30 with shipping, refurbished, whatever that means) on ebay. Am I correct in assuming this is where the sequencing logic for the mechanics of the printer resides? Does replacing the DC controller seem like a logical next step?

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